Table 3.
Enzyme | kcat (s−1) | Km (μM) | kcat/Km (M−1s−1) |
---|---|---|---|
NfsA | 43.8±7.0 | 840±260 | 5.2×104 |
NfsB | 45.3±0.9 | 45±3 | 1×106 |
Initial velocities were monitored at 340 nm at a fixed concentration of NAD(P)H (60 μM NADPH for NfsA, 60 μM NADH for NfsB) and varied concentrations of PT638 (6.25–1500 μM). Data were fit to the Michaelis–Menten equation.